1 . The world’s nights are getting brighter and brighter as light pollution invades darkness almost everywhere. Researchers found that Earth’s artificially lit outdoor area grew by 2% a year from 2012 to 2016. So did night time brightness. Light pollution was even worse than that, according to the German-led team, because the light sensor(感应器) cannot recognize some of the LED lighting that is becoming more widespread, specifically blue light.
“Honestly, I had hoped that with LEDs we were improving the situation. But it turns out quite disappointing.” said Kyba, the lead author of the study.
“Asia, Africa and South America, for the most part, saw an increase in artificial night lighting. More and more places are fixing outdoor lighting, due to its low cost and the growth in communities’ wealth,” the scientists said.
The biological effect from the increasing man-made light is obvious, according to the researchers. People’s sleep can be damaged, which in turn can affect their health. The living behavior of birds, fish, insects and bats can be interrupted. And forget about seeing stars or the Milky Way if the pollution continues.
“Many people are using light at night without really thinking about the cost, ” said Franz Holker, one of the co-authors. “Not just the economic cost, but also the cost that you have to pay for environmental damage.”
1. Why is the night becoming increasingly brighter?
| A．Artificial light is used in larger areas. |
| B．The light sensors fail to work properly. |
| C．LED lighting gives off too much blue light. |
| D．More families afford to use lighting at home. |
2. The brighter nights will bring about ________.
| A．a more balanced sleeping schedule |
| B．reduced cost of lighting during the night |
| C．a better view of stars and the Milky Way |
| D．harmful biological effects on some animals |
3. Where is this passage probably taken from?
| A．A tourist guide. | B．A science magazine. |
| C．A biology textbook. | D．A medical report. |
